Lake Eildon is a reservoir in the southern Australian state of Victoria. It was created by the damming of the Goulburn River at Eildon Weir. Upon reaching the destination storage it has a volume of 3.334158 billion cubic meters and contains six times as much water as Sydney Harbor. After the Dartmouth Dam it is the second largest reservoir in Victoria. It is located in the city Eildon in Lake Eildon National Park.